Synthesis, crystal structure, microstructure, transport and magnetic properties of SmFeAsO and SmFeAs(O<sub>0.93</sub>F<sub>0.07</sub>)
Synthesis, crystal structure, microstructure, transport and magnetic properties of SmFeAsO and SmFeAs(O<sub>0.93</sub>F<sub>0.07</sub>)
SmFeAsO and the isostructural superconducting SmFeAs(O0.93F0.07) phase were prepared and characterized by means of Rietveld refinement of x-ray powder diffraction data, scanning electron microscope observation, transmission electron microscope analysis, and resistivity and magnetization measurements. Sintering treatment strongly improves the grain connectivity, but, on the other hand, induces a competition between …